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feat: add a small benchmark for percent encoding decoding #217
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121 changes: 121 additions & 0 deletions
121
src/test/java/com/github/packageurl/PercentEncodingBenchmark.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| /* | ||
| * MIT License | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in all | ||
| * copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
| package com.github.packageurl; | ||
|
|
||
| import java.nio.charset.StandardCharsets; | ||
| import java.util.Random; | ||
| import java.util.concurrent.TimeUnit; | ||
| import org.openjdk.jmh.annotations.Benchmark; | ||
| import org.openjdk.jmh.annotations.BenchmarkMode; | ||
| import org.openjdk.jmh.annotations.Mode; | ||
| import org.openjdk.jmh.annotations.OutputTimeUnit; | ||
| import org.openjdk.jmh.annotations.Param; | ||
| import org.openjdk.jmh.annotations.Scope; | ||
| import org.openjdk.jmh.annotations.Setup; | ||
| import org.openjdk.jmh.annotations.State; | ||
| import org.openjdk.jmh.infra.Blackhole; | ||
|
|
||
| /** | ||
| * Measures the performance of performance decoding and encoding. | ||
| * <p> | ||
| * Run the benchmark with: | ||
| * </p> | ||
| * <pre> | ||
| * mvn -Pbenchmark | ||
| * </pre> | ||
| */ | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(TimeUnit.MICROSECONDS) | ||
| @State(Scope.Benchmark) | ||
| public class PercentEncodingBenchmark { | ||
|
|
||
| private static final int DATA_COUNT = 1000; | ||
| private static final int DECODED_LENGTH = 256; | ||
| private static final byte[] UNRESERVED = | ||
| "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~".getBytes(StandardCharsets.US_ASCII); | ||
|
|
||
| @Param({"0", "0.1", "0.5"}) | ||
| private double nonAsciiProb; | ||
|
|
||
| private String[] decodedData = createDecodedData(); | ||
| private String[] encodedData = encodeData(decodedData); | ||
|
|
||
| @Setup | ||
| public void setup() { | ||
| decodedData = createDecodedData(); | ||
| encodedData = encodeData(encodedData); | ||
| } | ||
|
|
||
| private String[] createDecodedData() { | ||
| Random random = new Random(); | ||
| String[] decodedData = new String[DATA_COUNT]; | ||
| for (int i = 0; i < DATA_COUNT; i++) { | ||
| char[] chars = new char[DECODED_LENGTH]; | ||
| for (int j = 0; j < DECODED_LENGTH; j++) { | ||
| if (random.nextDouble() < nonAsciiProb) { | ||
| chars[j] = (char) (Byte.MAX_VALUE + 1 + random.nextInt(Short.MAX_VALUE - Byte.MAX_VALUE - 1)); | ||
| } else { | ||
| chars[j] = (char) UNRESERVED[random.nextInt(UNRESERVED.length)]; | ||
| } | ||
| } | ||
| decodedData[i] = new String(chars); | ||
| } | ||
| return decodedData; | ||
| } | ||
|
|
||
| private static String[] encodeData(String[] decodedData) { | ||
| String[] encodedData = new String[decodedData.length]; | ||
| for (int i = 0; i < decodedData.length; i++) { | ||
| encodedData[i] = PackageURL.percentEncode(decodedData[i]); | ||
| } | ||
| return encodedData; | ||
| } | ||
|
|
||
| @Benchmark | ||
| public void baseline(Blackhole blackhole) { | ||
| for (int i = 0; i < DATA_COUNT; i++) { | ||
| byte[] buffer = decodedData[i].getBytes(StandardCharsets.UTF_8); | ||
| // Change the String a little bit | ||
| for (int idx = 0; idx < buffer.length; idx++) { | ||
| byte b = buffer[idx]; | ||
| if ('a' <= b && b <= 'z') { | ||
| buffer[idx] = (byte) (b & 0x20); | ||
| } | ||
| } | ||
| blackhole.consume(new String(buffer, StandardCharsets.UTF_8)); | ||
| } | ||
| } | ||
|
|
||
| @Benchmark | ||
| public void percentDecode(final Blackhole blackhole) { | ||
| for (int i = 0; i < DATA_COUNT; i++) { | ||
| blackhole.consume(PackageURL.percentDecode(encodedData[i])); | ||
| } | ||
| } | ||
|
|
||
| @Benchmark | ||
| public void percentEncode(final Blackhole blackhole) { | ||
| for (int i = 0; i < DATA_COUNT; i++) { | ||
| blackhole.consume(PackageURL.percentEncode(decodedData[i])); | ||
| } | ||
| } | ||
| } | ||
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